MLCCs reduce acoustic noise by up to 30 dB

The GJ8 series of multilayer monolithic ceramic chip capacitors (MLCCs) is designed to lower acoustic noise in consumer and industrial electronic applications — by up to 30 dB in the 1-µF model. The acoustic noise generated by 4.7 to 10-µF GJ8 series capacitors is said to represent an improvement of at least 10 dB over competitors’ MLCCs.

The unwanted sound is caused by the expansion and contraction of the dielectric element, which triggers the PCB to vibrate at the amplitude of the voltage applied. When the frequency of the voltage applied approaches audio frequencies, a noise can be heard. The GJ8 series of MLCCs, rated up to 50 V, dramatically reduces this sound.

In addition to its noise suppression capabilities, the new capacitors are available in low-profile models with thicknesses of 1.25, 1.60, or 2.50 mm, depending on capacitance. The compact size helps engineers design the capacitors into increasingly thinner and lighter electronics. (GJ8 series, parts 0805 to 1210 (1 to 10 µF), less than $0.50 each — approx 8 to 10 weeks ARO.)

Murata Electronics North America , Smyrna , GA
Information 770-436-1300
http://www.murata.com